I read those threads and I’m not sure what those people expected, but, as far as my understanding of it goes, that is exactly what ramps are supposed to do.
There are very few examples I can think of in the natural world that I can use to illustrate my point but here goes. Ramps work off light; lamps, their direction and intensity. They work either thru the Diffuse shader (Color Ramp) or thru the Specularity shader (Spec Ramp).
Now, even without ramps, if you were to set the Reflectivity of the diffuse shader too high, or, if you were to set the Spec and Hard too high, (or both at the same time) then you wouldn’t be able to see the (T of test) image texture thru the glare. And, since ramps ramp up those 2 values and their colors, the same must hold true for them.
If this bird had an image texture with “T.E.S.T” mapped to where the green feathers meet the gold, you wouldn’t see it either; the green would subtract it out and the gold would glare it out.